1 #ifndef GIT_COMPAT_UTIL_H
2 #define GIT_COMPAT_UTIL_H
5 #if defined(__GNUC__) && (__GNUC__ < 3)
8 #define FLEX_ARRAY /* empty */
12 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
14 #if !defined(__APPLE__) && !defined(__FreeBSD__)
15 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
16 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
32 #include <sys/param.h>
33 #include <sys/types.h>
41 #include <sys/socket.h>
44 #include <netinet/in.h>
45 #include <netinet/tcp.h>
46 #include <arpa/inet.h>
50 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
58 /* On most systems <limits.h> would have given us this, but
59 * not on some systems (e.g. GNU/Hurd).
66 #define NORETURN __attribute__((__noreturn__))
70 #define __attribute__(x)
74 /* General helper functions */
75 extern void usage(const char *err) NORETURN;
76 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
77 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
78 extern void warn(const char *err, ...) __attribute__((format (printf, 1, 2)));
80 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
81 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
82 extern void set_error_routine(void (*routine)(const char *err, va_list params));
83 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
91 #define MAP_FAILED ((void*)-1)
95 #define munmap git_munmap
96 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
97 extern int git_munmap(void *start, size_t length);
99 /* This value must be multiple of (pagesize * 2) */
100 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
104 #include <sys/mman.h>
106 /* This value must be multiple of (pagesize * 2) */
107 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
108 (sizeof(void*) >= 8 \
109 ? 1 * 1024 * 1024 * 1024 \
114 #define DEFAULT_PACKED_GIT_LIMIT \
115 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
118 #define pread git_pread
119 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
123 #define setenv gitsetenv
124 extern int gitsetenv(const char *, const char *, int);
128 #define unsetenv gitunsetenv
129 extern void gitunsetenv(const char *);
133 #define strcasestr gitstrcasestr
134 extern char *gitstrcasestr(const char *haystack, const char *needle);
138 #define strlcpy gitstrlcpy
139 extern size_t gitstrlcpy(char *, const char *, size_t);
142 extern void release_pack_memory(size_t);
144 static inline char* xstrdup(const char *str)
146 char *ret = strdup(str);
148 release_pack_memory(strlen(str) + 1);
151 die("Out of memory, strdup failed");
156 static inline void *xmalloc(size_t size)
158 void *ret = malloc(size);
162 release_pack_memory(size);
167 die("Out of memory, malloc failed");
169 #ifdef XMALLOC_POISON
170 memset(ret, 0xA5, size);
175 static inline void *xrealloc(void *ptr, size_t size)
177 void *ret = realloc(ptr, size);
179 ret = realloc(ptr, 1);
181 release_pack_memory(size);
182 ret = realloc(ptr, size);
184 ret = realloc(ptr, 1);
186 die("Out of memory, realloc failed");
191 static inline void *xcalloc(size_t nmemb, size_t size)
193 void *ret = calloc(nmemb, size);
194 if (!ret && (!nmemb || !size))
197 release_pack_memory(nmemb * size);
198 ret = calloc(nmemb, size);
199 if (!ret && (!nmemb || !size))
202 die("Out of memory, calloc failed");
207 static inline void *xmmap(void *start, size_t length,
208 int prot, int flags, int fd, off_t offset)
210 void *ret = mmap(start, length, prot, flags, fd, offset);
211 if (ret == MAP_FAILED) {
214 release_pack_memory(length);
215 ret = mmap(start, length, prot, flags, fd, offset);
216 if (ret == MAP_FAILED)
217 die("Out of memory? mmap failed: %s", strerror(errno));
222 static inline ssize_t xread(int fd, void *buf, size_t len)
226 nr = read(fd, buf, len);
227 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
233 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
237 nr = write(fd, buf, len);
238 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
244 static inline int has_extension(const char *filename, const char *ext)
246 size_t len = strlen(filename);
247 size_t extlen = strlen(ext);
248 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
251 /* Sane ctype - no locale, and works with signed chars */
258 extern unsigned char sane_ctype[256];
259 #define GIT_SPACE 0x01
260 #define GIT_DIGIT 0x02
261 #define GIT_ALPHA 0x04
262 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
263 #define isspace(x) sane_istest(x,GIT_SPACE)
264 #define isdigit(x) sane_istest(x,GIT_DIGIT)
265 #define isalpha(x) sane_istest(x,GIT_ALPHA)
266 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
267 #define tolower(x) sane_case((unsigned char)(x), 0x20)
268 #define toupper(x) sane_case((unsigned char)(x), 0)
270 static inline int sane_case(int x, int high)
272 if (sane_istest(x, GIT_ALPHA))
273 x = (x & ~0x20) | high;